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KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics

Open access
Asgari, Marika, Lin, Chieh-An, Joachimi, Benjamin, Giblin, Benjamin, Heymans, Catherine, Hildebrandt, Hendrik, Kannawadi, Arun, Stölzner, Benjamin, Tröster, Tilman, van den Busch, Jan Luca, Wright, Angus H., Bilicki, Maciej, Blake, Chris, de Jong, Jelte, Dvornik, Andrej, Erben, Thomas, Getman, Fedor, Hoekstra, Henk, Köhlinger, Fabian, Kuijken, Konrad, Miller, Lance, Radovich, Mario, Schneider, Peter, Shan, HuanYuan, Valentijn, Edwin·2021·Astronomy & Astrophysics

Abstract

We present cosmological constraints from a cosmic shear analysis of the fourth data release of the Kilo-Degree Survey (KiDS-1000), which doubles the survey area with nine-band optical and near-infrared photometry with respect to previous KiDS analyses. Adopting a spatially flat standard cosmological model, we find S8=σ8(Ω m/0.3)0.5= 0.759−0.021+0.024 for our fiducial analysis, which is in 3 σ tension with the prediction of the Planck Legacy analysis of the cosmic microwave background. We compare our fiducial COSEBIs (Complete Orthogonal Sets of E/B-Integrals) analysis with complementary analyses of the two-point shear correlation function and band power spectra, finding the results to be in excellent agreement. We investigate the sensitivity of all three statistics to a number of measurement, astrophysical, and modelling systematics, finding our S8 constraints to be robust and dominated by statistical errors. Our cosmological analysis of different divisions of the data passes the Bayesian internal consistency tests, with the exception of the second tomographic bin. As this bin encompasses low-redshift galaxies, carrying insignificant levels of cosmological information, we find that our results are unchanged by the inclusion or exclusion of this sample.

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Metadata

Authors
Asgari, M., Lin, C.-A., Joachimi, B., Giblin, B., Heymans, C., Hildebrandt, H., Kannawadi, A., Stölzner, B., Tröster, T., van den Busch, J. L., Wright, A. H., Bilicki, M., Blake, C., de Jong, J., Dvornik, A., Erben, T., Getman, F., Hoekstra, H., Köhlinger, F., Kuijken, K., Miller, L., Radovich, M., Schneider, P., Shan, H., & Valentijn, E.
Venue
Astronomy & Astrophysics
Publisher
EDP Sciences
Published
2021-01
Volume
645
Pages
A104
ISSN
  • 0004-6361 (ISSN-L)
  • 1432-0746
OpenAlex
W3046141395
Cited by
750
References
8
FWCI
42.86
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics. https://app.cochat.ai/papers/10.1051/0004-6361/202039070
The paper
Asgari, M., Lin, C.-A., Joachimi, B., Giblin, B., Heymans, C., Hildebrandt, H., Kannawadi, A., Stölzner, B., Tröster, T., van den Busch, J. L., Wright, A. H., Bilicki, M., Blake, C., de Jong, J., Dvornik, A., Erben, T., Getman, F., Hoekstra, H., Köhlinger, F., . . . Valentijn, E. (2021). KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics. Astronomy & Astrophysics. https://doi.org/10.1051/0004-6361/202039070

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